36 THE CANADIAN ENTOMOLOGIST. 



has kindly sent me a drawing of the fossil, and judging from this and the 

 description, I would place the insect preferably in Leachia. 



Post script. — Leachia, Sign., may be altered to Pal^ococcus, as the 

 name is preoccupied in MoUusca. I did not make the change in the list, 

 as I was not sure whether the MoUuscan name was valid, and I hold the 

 " once a synonym, always a synonym " doctrine to the ridiculous. How- 

 ever, I have just received the following from Dr. W. H. Dall, to whom I 

 had applied for information: — '■'■Leachia l^t'itn&r, =^ LoHgopsis, Lam., 

 but Leachia, Risso, according to Monterosato, is valid and is the earliest 

 name for the group to which it is applied. I should advise changing your 

 Coccid Leachia under the circumstances." T. D. A. Cocker ell. 



NOTES ON COLEOPTERA. 



BY C. W. STROMBERG, GALESBURG, ILL. 



There are still a few species of Agrilus in our fauna whose food plant 

 is unknown. Any contribution in that direction may, therefore, be of 

 intf^rcst. It is a genus that seems to be much neglected by collectors, 

 owing undoubtedly to the difficulty met with in separating some of the 

 species. There are several seemingly difficult ones, however, which are 

 stamped with such distinct characters as to make their study exceedingly 

 interesting. With Dr. Horn's valuable paper, " The Species of Agrilus of 

 Boreal America," and a well-trained eye, one should be able to get along 

 without much assistance. That does not apply to myself, for it was only 

 after Mr. Blanchard kindly undertook to help me out that my material 

 was properly labelled. 



Agrilus masculiiius, Horn, was taken during July on the common 

 box-elder or ashleaved maple (Negundo aceroides.) This species 

 resembles otiosus, but the S has " prosternum with a space in front 

 densely covered with short erect pubescence." This patch of hair is of 

 a yellowish colour and can be seen distinctly with an ordinary lens if the 

 insect is held up sidewise to the light. Once seen it will always be 

 recognized. The $ is not easily distinguished from otiosus. 

 A. otiosus was beaten from hickory, walnut, butternut and dogwood. 

 A. arcuatus, oak, elm and hazel. 

 A. fa/lax, oak, June 12. 



A. obsoietoguttatus, quite common on the red and laurel oaks, June. 

 A. Lecontei, not rare on hackberry (Celtis occidentalis), June and July. 

 A. impexus occurs on the two locusts (Gleditschia triacanthus and 



